I live right near where you're moving. Just a bit north.
Closest hospital: Jupiter Medical Center in Jupiter. Very good reputation. Communty Hospital, very well regarded. Start there is you don't want to travel.
Palm Beach Gardens Medical Center. Big, part of a chain. Good cardiac division. All the cardiac caths in the area are done there.
In Stuart (just a bit to the north) Martin Memorial Hospital, north and south (both in Stuart). I think it has a pretty good rep.
In West Palm Beach (south of you) St. Mary's (has the local advanced trauma center). Also Columbia. There are more if you want to go farther. Also lots of surgicenters. No shortage of work here! You won't have any problem!
You don't have to take the boards again! Just go to Myflorida.com and click around till you get to the link for health licenses. It's a pretty user friendly site. It takes a little while to get the license once you apply so get on it!
Get used to the fact that the wages in Florida are not what they are in the northeast. I moved from Long Island, so I was in shock. I'm used to it now though
The cost of living is less here than on Long Island, no matter what anyone says. I don't know about Philly.
You're going to LOVE the winter here. You're coming at the best time of the year. Jupiter is BEAUTIFUL! Wait till you see that beach with the turquoise water, and it's warm enough to go swimming all year!